Revert of Remove migrateNetworkPredictionPreferences().

chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
index 6988a3891e6c5dec0de084b053cfb2408f0328c0..7d59b9205e85a923f31507f2a444979a9ee8dbb6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
@@ -565,6 +565,30 @@
      */
     public boolean isSafeBrowsingManaged() {
         return nativeGetSafeBrowsingManaged();
+    }
+
+    /**
+     * @return whether there is a user set value for kNetworkPredictionEnabled.  This should only be
+     * used for preference migration.
+     */
+    public boolean networkPredictionEnabledHasUserSetting() {
+        return nativeNetworkPredictionEnabledHasUserSetting();
+    }
+
+    /**
+     * @return whether there is a user set value for kNetworkPredictionOptions.  This should only be
+     * used for preference migration.
+     */
+    public boolean networkPredictionOptionsHasUserSetting() {
+        return nativeNetworkPredictionOptionsHasUserSetting();
+    }
+
+    /**
+     * @return the user set value for kNetworkPredictionEnabled. This should only be used for
+     * preference migration.
+     */
+    public boolean getNetworkPredictionEnabledUserPrefValue() {
+        return nativeGetNetworkPredictionEnabledUserPrefValue();
     }
 
     /**
@@ -1020,6 +1044,9 @@
     private native void nativeSetSafeBrowsingEnabled(boolean enabled);
     private native boolean nativeGetSafeBrowsingManaged();
     private native boolean nativeGetNetworkPredictionManaged();
+    private native boolean nativeNetworkPredictionEnabledHasUserSetting();
+    private native boolean nativeNetworkPredictionOptionsHasUserSetting();
+    private native boolean nativeGetNetworkPredictionEnabledUserPrefValue();
     private native int nativeGetNetworkPredictionOptions();
     private native void nativeSetNetworkPredictionOptions(int option);
     private native void nativeSetResolveNavigationErrorEnabled(boolean enabled);